Large-diameter metal-on-metal hips were thought to be an independent risk factor in hip failure, besides the material from which the prosthetic was made. But according to a recent study, adverse reactions to metal debris from small-headed metal-on-metal Articular Surface Replacement (ASR) hips are even more common than originally thought. In the study, 482 hips (424 patients) were reviewed. After the ASR small-diameter hip was recalled at an average of 4.9 years post-op, 379 patients (435 hips) agreed to a screening that measured cobalt and chromium in the blood. Metal-on-metal hip implants are created with a ball-and-cup design made up of a cobalt-chromium ... Read More
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